mesg = '   +7'
mesg = '   -9<?ello>'
mesg = '7  '
[input1.txt:1] buff = '2008        , tok=3:'1'
[input1.txt:2] buff = '-35', tok=3: <NUMBER>
[input1.txt:2] buff = '2008        , tok=3:'2'
[input1.txt:2] buff = '-35', tok=3: <NUMBER> at [input1.txt:2]
[input1.txt:3] buff = '-35+2008', tok=3: at [input1.txt:3]
